Just thought I'd update. The little girl is still very skinny, but I did see her eating some blackworms today, and she was actively "poofing" into the rocks, looking for more. She's also been very active, even swimming around the tank, up the sides, under the driftwood, etc. I haven't seen her play in the bubble column yet, but hopefully she will.
I don't know if she's out of the woods yet, but she definitely seems to be doing better than she has been for the last few days.